fide

例句:

• We are happy to donate to bona fide charitable causes.
  我们很乐意为真正的慈善事业捐献财物。
  
• a bona fide reason
  真正原因
  
• Rehnuma, meanwhile, is a bona-fide killer track.
  来自BBC
• I would say that was the first bona fide demonstration.
  来自SA
• There are few bona fide readers but many dippers.
  真诚精读的人很少,但粗读者却很多.
  
• Fortunately, I have bona fide professors to give me physics lectures.
  来自SA